论文部分内容阅读
一、14C年代测定单板机的功能1.数据处理 1)被测样品的在线数据处理 14C年代测量时间较长,一般一个样品要测够1000分钟,每10分钟为一段,测量到预置的时间后,单板机就用“3σ”作判据对各段计数进行统计检验,对偏离值超过“3σ”的数据可剔除掉,若要求测量时间一致,还可再补充新的测量值,经过剔除和补充后,将得到“σ1”值,再用“3σ1”作判据,重新进行统计检验,直至全部偏离值没有超过“3σn”为止。仪器及电网负载工作状态正常时,偏离值超过“3σn”的机率只有3‰,所以一般不需要剔除和补充。当测量结束时,打印机打出样品的平均计数率、标准误差、试验误
First, the 14C dating the function of the single-board machine 1. Data Processing 1) online data processing of the sample measured 14C time measurement time is longer, usually a sample to be enough for 1000 minutes, every 10 minutes for a period of measurement to preset After the time, the board machine uses the “3σ” as the criterion to count the statistics of each section, and the data of the deviation value exceeding “3σ” can be removed. If the measurement time is required, the new measurement value can be further added, After removing and supplementing, the value of “σ1” will be obtained, and then “3σ1” will be used as the criterion to restart the statistical test until all deviation values do not exceed “3σn”. Instruments and power grid load working state is normal, the deviation value exceeds the “3σn” probability is only 3 ‰, so generally do not need to remove and supplement. When the measurement is completed, the printer hit the average count rate of the sample, the standard error, the test error